[C's 94 InTeGrA]

Well right now i am running the Jackson Racing Supercharger on my LS as most of you know. But i have some issues with it. First and for most i am running very very rich to the point to where black sh*t pours out of the exhaust. I have asked tons of people who know about forced induction and i keep getting different answers. How can i get it to stop running so rich. Also times at the track are really bad. Only things i have done to the car are:
Thermal Classic cat-back exhaust
MSD 8.5mm plug wires
Centerforce Stage 2 Clutch
Iceman converted to short ram
B&M fuel pressure gauge

Thats about it. WE have tried to play with the fmu and watched the fuel pressure gauge some. Also this is a newer motor i just did. I got rid of the stock one that came in the car and found a LS with only about 30K on it. We didnt do too much with timing cause it was already set at 10 degrees but we bumped it up 11. I really dont know what else to do with this. But if u have any more questions or any input that would be great on what else i need to do thanks.